https://0607501b.wangpeng.pages.dev/en/tags/aggregate/Recent content in Aggregate on Zhuifeng NotesHugoenWed, 12 Aug 2026 00:00:00 +0000https://0607501b.wangpeng.pages.dev/en/architecture/ddd-aggregate/Wed, 12 Aug 2026 00:00:00 +0000https://0607501b.wangpeng.pages.dev/en/architecture/ddd-aggregate/<p>In an ECIF, the concept of &ldquo;customer&rdquo; is huge: retail, corporate, and interbank clients each have different attributes, relationships, and lifecycles. Forcing them into one giant <code>Customer</code> entity makes the code rot fast.</p> <h2 id="slice-by-bounded-context">Slice by bounded context</h2> <p>Split the customer across bounded contexts:</p> <ul> <li><strong>Party (master data)</strong>: unified natural-person / institution identity and base attributes.</li> <li><strong>Profile</strong>: risk appetite, marketing tags — high read/write churn.</li> <li><strong>Relationship</strong>: shareholding, guarantee, and group relationships.</li> </ul> <h2 id="where-the-aggregate-root-goes">Where the aggregate root goes</h2> <p>Each context defines its own aggregate root. In Party, <code>Party</code> is the root; <code>Address</code> and <code>Contact</code> are value objects, keeping cross-aggregate calls out of the consistency boundary.</p>